Months later her liver was failing and she was transferred to London’s Royal Free Hospital by ambulance to wait for a transplant.

“Some moments were filled with incredible guilt that I was waiting for an organ to become available,” said Mrs Lacey.

But there were also mixed feelings when she got a donor.

“I was flooded with happiness and fear also. There was a realisation that I didn’t have to die,” she said.

“I feel a responsibility to live my life to the absolute fullest, one full of adventure and really experiencing everything I can and taking everything in and doing everything I can for others wherever I can. It’s really hammered the importance of that home very much.”

Image copyrightPaul LaceyImage caption Mrs Lacey won gold in the 800m at the British Transplant Games six months after her transplant

Despite a change in the law in Wales, the number of deceased donors has stayed the same.

With an average of 3.1 organs retrieved per donor, the refusal of 21 families to give consent last year could have prevented 65 transplants.

Wales’ chief medical officer, Dr Frank Atherton, said he was in contact with colleagues in Scotland and England about their plans to move to a similar presumed consent system.

He said: “I talk regularly with the chief medical officers of those countries, our cabinet secretary has written formally to England to support the consultation and at officer level we have a lot of input into helping to shape the consultation that’s going on in England and to think about implementation as Scotland moves down this road.

“It’s great to work in collaboration with our colleagues in other UK nations and we’re delighted that Wales is leading the way on this.”

The NHS Blood and Transplant service said 6,500 people across the UK were on the transplant waiting list, including 242 in Wales.